WebVTT

Summary

WebVTT (Web Video Text Tracks) is a format for displaying timed text tracks (e.g. subtitles) with the <track> element. The primary purpose of WebVTT files is to add subtitles to a <video>.

References

• Wiki page
• WebVTT spec
• HTML5 Track Element spec
• MDN -WebVTT
• Available samples:
  • Sample 1
  • Sample 2
  • Sample 3

Test Cases

• The test cases for this feature can be viewed in this Google Spreadsheet or in this Moztrap testsuite.

Bugs

• Tracking bug - 629350
• bug 887978 - Turn WebVTT on by default on trunk. - Verified Fixed
• bug 941701 - [WebVTT] Crash in [@ mozilla::dom::TextTrackCue::GetCueAsHTML()] - Verified Fixed
• bug 976580 - [WebVTT] Caption sizes aren't changing when the video enters full screen - Verified Fixed
• bug 863488 - [webvtt] captions do not display unless play() is called - New
• bug 879426 - [webvtt] TextTrack.mode should be being updated correctly - Verified Fixed
• bug 886353 - File->Save As...->Web Page, complete should also save the VTT file - New
• bug 973384 - Assertion failure when <track src> is a URL that redirects - New
• bug 975447 - Crash during shutdown CC with <video><track> - New
• bug 924675 - 'View video' should copy <track> elements. - New
• bug 980343 - [webvtt] Subtitle is not displayed in snapshots - New
• bug 964625 - The WebVTT parser does not require whitespace between timings and settings - Verified Fixed
• bug 983207 - [webvtt] Tracks created from TrackElements should have their mode set to 'disabled' by default - Verified Fixed
• bug 996331 - [webvtt] remove broken cuechange interface - Verified Fixed

Sign off

Criteria

• All the test cases were executed.
• All the blocker, critical, major bugs have been fixed.

Firefox 31 Aurora Sign Off - 05/02/2014

All the test cases were executed on the next OSs:

• Windows 7 64-bit
• Mac OS X 10.8.5
• Ubuntu 13.10 32-bit

Firefox 31 pre-Beta Sign Off - 06/05/2014

• All the test cases were executed on the next OSs:
  • Windows 7 64-bit
  • Mac OS X 10.7.5
  • Ubuntu 13.04 32-bit
• Test Run Results: Link

Firefox 31 Beta Sign Off - 07/10/2014

• All the test cases were executed on the next OSs:
  • Windows 7 64-bit
  • Mac OS X 10.9.4
  • Ubuntu 12.04 32-bit
• Test Run Results: Link